Tenure of Office Act (1867)
The Tenure of Office Act was a United States federal law, in force from 1867 to 1887, that was intended to restrict the power of the president to remove certain office-holders without the approval of the U.S. Senate. The law was enacted March 2, 1867, over the veto of President Andrew Johnson.
Source: Wikipedia — Tenure of Office Act (1867) (CC BY-SA 4.0)